Merge pull request #42 from lucafavatella/ci

Minor Travis CI updates
diff --git a/.travis.yml b/.travis.yml
index 1943fd9..225b83d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
+sudo: false
 language: erlang
 otp_release:
+  - 18.3
   - 17.3
   - 17.1
   - 17.0